Re-root site.

esp32/bterm.fs

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+\ Copyright 2021 Bradley D. Nelson
+\
+\ Licensed under the Apache License, Version 2.0 (the "License");
+\ you may not use this file except in compliance with the License.
+\ You may obtain a copy of the License at
+\
+\     http://www.apache.org/licenses/LICENSE-2.0
+\
+\ Unless required by applicable law or agreed to in writing, software
+\ distributed under the License is distributed on an "AS IS" BASIS,
+\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+\ See the License for the specific language governing permissions and
+\ limitations under the License.
+
+( Lazy loaded Bluetooth Serial Terminal )
+: bterm r|
+vocabulary bterm  bterm definitions
+also bluetooth also internals
+SerialBT.new constant bt
+z" forth" 0 bt SerialBT.begin drop
+esp_bt_dev_get_address hex 6 dump cr
+: bt-type bt SerialBT.write drop ;
+: bt-key
+   begin bt SerialBT.available until 0 >r rp@ 1 bt SerialBT.readBytes drop r> ;
+: bt-on ['] bt-type is type ['] bt-key is key ;
+: bt-off ['] serial-type is type ['] serial-key is key ;
+only forth definitions
+bterm 500 ms bt-on
+| evaluate ;